feat: update the example section, add a random choice for the phrase

feat: add examples

feat: add text to speech (TTS)

ci: hugginface space, move from docker to gradio sdk v5.6.0, add missing packages.txt with ffmpeg, pre-requirements.txt with pip, update gradio app to properly format informations to frontend, update tests

feat: first working gradio fronted with refactored lambda_handler and tests